For radio propagation at frequencies above 100 GHz, there is still a myth that the wireless channels at higher frequencies would experience more path loss as only omni-directional antennas are considered at both the link ends [1]}. If the effective aperture is kept constant over frequencies at both the TX and RX, the path loss decrease quadratically as frequency increases, although the current antenna techniques may not be able to keep the effective aperture constant at sub-THz frequencies compared to mmWave or lower frequencies.
